Question

There are three salts that contain octahedral complex ions of chromium and have the molecular formula CrCl 6 H20. Treating 0.27 g of the first salt with a strong dehydrating agent resulted in a mass loss of 0.036 g. Treating 270 mg of the second salt with the same dehydrating agent resulted in a mass loss of 18 mg. The third salt did not lose any mass when treated with the same dehydrating agent. Addition of excess aqueous silver nitrate to 100.0 mL portions of 0.100MM solutions of each salt resulted in the formation of different masses of silver chloride; one solution yielded 1430 mg AgCl; another 2870 mg AgCl; the third, 4300 mg AgCl. Two of the salts are green and one is violet. Suggest probable structural formulas for these salts. Justify your assignment based upon the chemical evidence given above. Which salt is most likely to be violet? Why is this?

Answer 1

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the abo likal to be. vîoar m colour.